parent
b46d37ea52
commit
5b792e0fdf
@ -222,6 +222,17 @@ func (abi *ABI) EventByID(topic common.Hash) (*Event, error) {
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return nil, fmt.Errorf("no event with id: %#x", topic.Hex())
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}
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// ErrorByID looks up an error by the 4-byte id,
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// returns nil if none found.
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func (abi *ABI) ErrorByID(sigdata [4]byte) (*Error, error) {
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for _, errABI := range abi.Errors {
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if bytes.Equal(errABI.ID[:4], sigdata[:]) {
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return &errABI, nil
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}
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}
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return nil, fmt.Errorf("no error with id: %#x", sigdata[:])
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}
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// HasFallback returns an indicator whether a fallback function is included.
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func (abi *ABI) HasFallback() bool {
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return abi.Fallback.Type == Fallback
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@ -1057,6 +1057,34 @@ func TestABI_EventById(t *testing.T) {
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}
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}
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func TestABI_ErrorByID(t *testing.T) {
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abi, err := JSON(strings.NewReader(`[
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{"inputs":[{"internalType":"uint256","name":"x","type":"uint256"}],"name":"MyError1","type":"error"},
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{"inputs":[{"components":[{"internalType":"uint256","name":"a","type":"uint256"},{"internalType":"string","name":"b","type":"string"},{"internalType":"address","name":"c","type":"address"}],"internalType":"struct MyError.MyStruct","name":"x","type":"tuple"},{"internalType":"address","name":"y","type":"address"},{"components":[{"internalType":"uint256","name":"a","type":"uint256"},{"internalType":"string","name":"b","type":"string"},{"internalType":"address","name":"c","type":"address"}],"internalType":"struct MyError.MyStruct","name":"z","type":"tuple"}],"name":"MyError2","type":"error"},
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{"inputs":[{"internalType":"uint256[]","name":"x","type":"uint256[]"}],"name":"MyError3","type":"error"}
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]`))
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if err != nil {
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t.Fatal(err)
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}
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for name, m := range abi.Errors {
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a := fmt.Sprintf("%v", &m)
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var id [4]byte
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copy(id[:], m.ID[:4])
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m2, err := abi.ErrorByID(id)
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if err != nil {
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t.Fatalf("Failed to look up ABI error: %v", err)
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}
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b := fmt.Sprintf("%v", m2)
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if a != b {
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t.Errorf("Error %v (id %x) not 'findable' by id in ABI", name, id)
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}
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}
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// test unsuccessful lookups
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if _, err = abi.ErrorByID([4]byte{}); err == nil {
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t.Error("Expected error: no error with this id")
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}
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}
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// TestDoubleDuplicateMethodNames checks that if transfer0 already exists, there won't be a name
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// conflict and that the second transfer method will be renamed transfer1.
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func TestDoubleDuplicateMethodNames(t *testing.T) {
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@ -78,7 +78,7 @@ func NewError(name string, inputs Arguments) Error {
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}
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}
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func (e *Error) String() string {
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func (e Error) String() string {
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return e.str
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}
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